Fast, Reliable Duct Repair & Sealing Across Van Nuys
Van Nuys sits at the dead center of the San Fernando Valley’s heat bowl — and if you’ve lived here through a July or August, you already know what that means for your HVAC system. Leaky or deteriorated ducts don’t just waste energy in this climate; they actively pull attic air that can hit 155°F into your supply stream while your system works overtime just to keep up. Our Duct Repair & Sealing team reaches homes across Van Nuys quickly, and Brandon Flores — owner and lead technician with 19 years of dedicated duct work — handles your job personally. Call (424) 219-7459 for a free estimate.
Why Certified Air Duct Specialists North Hollywood Is Van Nuys’s Preferred Duct Repair & Sealing Company
We’ve worked in Van Nuys long enough to know which neighborhoods have the oldest flex-duct installations, which attic configurations trap the most heat, and why homes near Woodley Avenue present duct contamination challenges you simply don’t see six miles west in Encino. That kind of field-specific knowledge shapes how we diagnose and repair — not just what we quote. Our service area covers all Van Nuys ZIP codes from 91401 through 91410, and we’re familiar with the housing stock across Van Nuys street by street.
613 homeowners. 4.9 stars. Consistent, repeatable results across nearly two decades — and a meaningful share of those reviews come from Van Nuys residents who found us after a low-bid competitor left gaps unsealed or flex duct partially reconnected. Brandon Flores isn’t a franchise dispatcher sending anonymous technicians; he’s the most experienced person on the job, every time, and his name is attached to every result. That accountability matters when you’re trusting someone with the air your family breathes.
Our Duct Repair & Sealing Services in Van Nuys
Duct Sealing
Leaky duct joints are the single most common energy drain we find in Van Nuys homes — and in a climate where cooling costs can spike sharply from June through September, even a 15–20% duct leakage rate translates to real money lost every billing cycle. We apply professional-grade mastic sealant to joints, seams, and connections throughout the system, creating an airtight bond that outlasts tape-based repairs by years. This is especially critical in Van Nuys, where the SCAQMD consistently ranks local PM2.5 levels among the worst in California — every unsealed gap is a direct pathway for that air into your home.
Flex Duct Repair
Van Nuys’s post-war tract homes and older apartment complexes were retrofitted with flex duct starting in the 1960s and 70s, and those original mylar jackets have now spent 50-plus years in attics that routinely reach 150–160°F on summer afternoons. That thermal stress causes partial collapses, disconnected inner liners, and shredded outer jackets — all of which choke airflow and allow attic debris into your supply air. We replace compromised flex-duct runs with properly supported, insulated sections that hold their shape year-round, not just through the first cool season.
Metal Duct Repair
The original sheet-metal duct systems installed during Van Nuys’s 1950s–1970s suburban buildout are now showing cracked mastic seals, separated joints at elbow fittings, and pinhole corrosion in older galvanized sections. We locate every breach using a methodical inspection process, then seal or replace affected sections using the right material for each failure type — not a one-size patch job. For homes along the Sepulveda Boulevard corridor or near the Van Nuys Airport’s east 405 corridor, we’ve also encountered elevated gritty deposits in metal trunk lines that require thorough cleaning before any sealing work holds properly.
Duct Insulation
Uninsulated or under-insulated ducts in Van Nuys attics lose a significant portion of conditioned air to heat gain before it ever reaches your living space — in a 110°F attic, even R-4 wrapped flex duct performs well below its rated value. We assess existing insulation ratings, identify sections where vapor barriers have failed or insulation has been physically disturbed, and install properly rated wrap or board insulation that actually matches the thermal demands of a true San Fernando Valley summer. This work pairs directly with sealing — there’s no point sealing a duct that’s shedding its insulation lining into the airstream.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Van Nuys
Van Nuys homes run the full range of HVAC equipment — from older Honeywell zone-control systems in 1960s two-stories to newer Aprilaire filtration setups in remodeled properties near the Sepulveda/Victory intersection. We work with equipment from Honeywell, Aprilaire, Abatement Technologies, and Guardsman, and our diagnosis tools include professional-grade Rotobrush and Nikro systems — not hardware-store shop vacs repurposed for duct work. When a repair calls for specific fittings or sealant materials, we arrive stocked for the job rather than making a return trip, keeping turnaround tight for Van Nuys customers.
Common Duct Repair & Sealing Problems We See in Van Nuys Homes
- Collapsed or partially disconnected flex duct in attic runs: The combination of age and extreme attic heat — regularly 150°F or higher in Van Nuys summers — causes the inner wire coil and mylar jacket to separate, strangling airflow to back bedrooms and second floors. Homeowners usually notice uneven cooling first, attributing it to the unit rather than the duct.
- Failed mastic seals at sheet-metal joints in older tract homes: The original mastic applied during the 1960s–70s buildout has long since dried, cracked, and pulled away from seams — often visible as fine dust rings on the duct surface. These gaps allow conditioned air to dump directly into attic space and draw attic air back on the return side.
- Elevated particulate deposits in duct systems near Van Nuys Airport: Homes within roughly a mile of KVNY — particularly east of the 405 near Woodley Avenue — show a distinctive gritty, dark particulate accumulation in supply runs that differs from standard household dust. This material binds to duct walls and, when disturbed by airflow changes, recirculates through the living space.
- Deteriorated duct-board liner shedding fiberglass into the airstream: Many Van Nuys homes built in the 1970s used duct board for plenums and short trunk sections. After decades of thermal cycling, the inner liner delaminates and sheds fibers — a problem that requires replacement, not sealing, and one that our full inspection process catches before it’s misdiagnosed as a simple air quality issue.
Pricing for Duct Repair & Sealing in Van Nuys, CA
Duct repair and sealing in Van Nuys is priced by scope, access, and the condition of the existing system — but here are the honest ranges our Van Nuys customers actually see:
- Mastic sealant application (whole-system): $350–$650 for a typical single-story Van Nuys tract home; two-story homes or apartment units with longer runs run $600–$950.
- Flex duct repair or partial replacement (per run): $180–$380 per section, depending on length and attic accessibility.
- Metal duct joint repair or re-sealing: $120–$280 per area, with full trunk-line repairs on the higher end.
- Duct insulation replacement or upgrade: $400–$900 for a standard Van Nuys home attic, depending on linear footage and current R-value.
- Air leak repair (targeted, specific breach): $95–$220 per location.
What drives cost up: limited attic access, multiple system zones, and ducts that need cleaning before sealing can hold. What keeps it lower: newer flex duct that only needs reconnection, or a single-zone system with open attic access. Every estimate is free — call (424) 219-7459 and Brandon will give you a straight number before any work begins.
We Also Serve Cities Near Van Nuys
Our service area extends throughout the central and western San Fernando Valley. Beyond Van Nuys, we regularly serve homeowners in Valley Glen, Sherman Oaks, Encino, and North Hills — all facing the same extreme-attic heat and aging duct stock that defines this part of the Valley. If you’re just outside Van Nuys, call us — the drive is short and the expertise is the same.
Serving Van Nuys, CA — Our Local Coverage Area
We’re based in the Van Nuys area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs — Duct Repair & Sealing in Van Nuys
We can typically reach most Van Nuys addresses — whether you’re near the Van Nuys Civic Center on Sylmar Avenue, off Victory Boulevard in the 91405 ZIP, or further west near the 101/405 interchange area — within a day or two of your call, and often sooner for urgent situations. Because Brandon Flores handles jobs personally rather than dispatching rotating crews, scheduling is straightforward and the technician showing up is the one you spoke with. Call (424) 219-7459 to check current availability — same-week appointments are usually possible.
Yes — we service all Van Nuys ZIP codes: 91401, 91404, 91405, 91406, 91407, 91408, 91409, and 91410. Whether your home is closer to the Van Nuys Airport on the west side of the 405 or east of Sepulveda near Valley Glen, we cover the full neighborhood. Call (424) 219-7459 if you’re unsure about your specific address.
Genuinely, yes — and the reason is specific to Van Nuys’s geography. The San Fernando Valley’s thermal bowl effect means Van Nuys attics reach temperatures that coastal LA neighborhoods simply don’t, which degrades flex duct and mastic seals faster. Combine that with SCAQMD air quality data showing Van Nuys-area PM2.5 among the worst in the state, and every leaky duct joint is actively pulling some of California’s most polluted ambient air into your home’s supply stream. Delaying repair here carries a higher indoor air quality cost than it would in, say, a Westside home 15 miles away. Call (424) 219-7459 to schedule an inspection before next summer’s heat cycle does more damage.
Our rates are consistent across the central Valley — you won’t pay a premium for a Van Nuys address versus Sherman Oaks or Encino. The price difference between jobs in these areas comes from the home itself: age of the duct system, attic access, and scope of damage, not the city. Van Nuys’s older housing stock does mean we more frequently find systems that need both repair and cleaning before sealing holds — which can affect total cost — but we’ll tell you exactly what’s needed and why before we start. Free estimates at (424) 219-7459.
Our mastic sealing and duct repair work is backed by a workmanship warranty — if a repair we performed fails under normal operating conditions, we return and fix it. Given Van Nuys’s extreme attic temperatures, we use materials rated for the thermal conditions specific to this climate, which is why our repairs hold where tape-based patches from less experienced outfits fail within a season or two. Brandon Flores’s name is on every job, which means the accountability is direct and personal. Call (424) 219-7459 to discuss warranty terms for your specific repair scope before you book.
Schedule Your Van Nuys Duct Repair & Sealing Estimate
If your Van Nuys home is running unevenly, your energy bills climbed this past summer, or you simply know the duct system hasn’t been inspected in years, this is the right time to call — before another 100°F stretch puts the whole system under maximum stress. Brandon Flores will assess your duct system personally, give you a straight diagnosis, and quote the repair honestly with no upsell pressure. Reach us at (424) 219-7459 — estimates are free, the conversation is direct, and the work gets done right the first time.
Reviewed by Brandon Flores, Owner & Lead Technician at Certified Air Duct Specialists North Hollywood, serving Van Nuys and the San Fernando Valley for 19 years.
